Self-resetting power generation method, power generation device and switch module

Abstract

This invention discloses a self-resetting power generation method, relating to power generation technology. It involves designing a demagnetizing window with a magnetic force difference, placing a power generation component within the demagnetizing window, and placing the component in a first magnetized state. A first-direction relative movement is driven between the power generation component and the demagnetizing window, changing the component from the first magnetized state to a second magnetized state. During this transition, the magnetic flux within the component changes, thereby generating induced electrical energy in the coil. After the driving force is removed, the component, under the influence of the magnetic force difference within the demagnetizing window, moves in a second direction opposite to the first direction, thus resetting the component to the first magnetized state. This invention also discloses a power generation device and a switching module. This invention solves the problem of excessive force required for pressing in existing spring-based self-resetting power generation methods.

Description

Technical Field

[0001] This invention relates to power generation technology, and more specifically, to a self-resetting power generation method, power generation device, and switching module. Background Technology

[0002] Self-generating wireless switches (such as doorbells) that generate electricity by pressing have the advantage of being battery-free, energy-saving, and environmentally friendly. However, existing reset-type self-generating devices based on electromagnetic induction technology require a large driving force, making them still very difficult to press. This is mainly because after triggering the power generation action, the internal moving parts need an additional reset mechanism such as a spring or an external driving force to return to the initial position in preparation for the next power generation. This design makes the structure of the power generation device more complex, increasing manufacturing costs and size. Furthermore, the long-term use of the reset mechanism may lead to a decrease in reliability due to fatigue, preventing self-generating wireless switches from being widely accepted in the market. Therefore, this invention provides a self-generating device with a lower pressing force. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a self-resetting power generation method, power generation device and switch module, which solves the problem of the laborious pressing of the power generation method of self-resetting by spring in the prior art.

[0004] The present invention discloses a self-resetting power generation method, which designs a demagnetizing window with magnetic force difference, places a power generation component in the demagnetizing window, and puts the power generation component in a first magnetized state. The relative movement between the power generation component and the demagnetizing window in a first direction is driven, and the power generation component is changed from the first magnetized state to the second magnetized state, so that the magnetic flux in the power generation component changes during the process of changing the magnetized state, thereby generating induced electrical energy in the coil. After the drive is removed, the power generation component operates in a second direction opposite to the first direction under the influence of the magnetic force difference in the demagnetization window, so that the power generation component is reset to the first magnetized state.

[0005] Preferably, the demagnetizing window has a first magnetic end and a second magnetic end arranged opposite to each other, wherein the magnetic force of the first magnetic end is greater than the magnetic force of the second magnetic end, so as to create a magnetic difference environment in the demagnetizing window.

[0006] Preferably, when the power generation component is in the first magnetized state, the power generation component is magnetized by the first magnetic end; when the power generation component is in the second magnetized state, the magnetic force exerted on the power generation component by the first magnetic end is greater than the magnetic force exerted on the power generation component by the first magnetized end.

[0007] Preferably, when the power generation component changes its magnetic state, the electromagnetic pulse duration is less than 1.5 milliseconds and the voltage amplitude is less than 10V.

[0008] A power generation device based on the aforementioned power generation method includes a power generation component and a magnetic differential component; the power generation component consists of an iron core and a coil wound on the iron core, and the magnetic differential component consists of a demagnetizing plate, a magnet, and a magnetic guiding plate mounted on a swing bracket, wherein the demagnetizing plate and the magnetic guiding plate are respectively mounted on two magnetic poles of the magnet, so that a demagnetizing window is formed between the demagnetizing plate and the magnetic guiding plate.

[0009] Preferably, the magnetic force provided by the demagnetizing plate to the iron core is less than the magnetic force provided by the magnetically conductive plate to the iron core.

[0010] Preferably, the magnetic conductive area of ​​the demagnetizing plate is smaller than the magnetic conductive area of ​​the magnetic conductive plate.

[0011] Preferably, the contact area between the magnetic conductive plate and the iron core is greater than the contact area between the demagnetizing plate and the iron core.

[0012] Preferably, when the power generation component is in the first magnetized state, the iron core is in direct contact with the magnetic plate, and there is a gap between the iron core and the demagnetizing plate; when the power generation component is in the second magnetized state, there are gaps between the iron core and both the magnetic plate and the demagnetizing plate, and the magnetic attraction force of the iron core on the magnetic plate is greater than the magnetic attraction force of the iron core on the demagnetizing plate.

[0013] A switching module includes a housing and a circuit board, wherein the power generation device is installed in the housing; wherein the power generation component is installed in the housing and electrically connected to the input terminal of the circuit board, the swing bracket of the magnetic differential component is rotatably installed in the housing, the iron core of the power generation component is inserted into the demagnetizing window and is attracted by the magnetic plate of the magnetic differential component; an operation port is provided on one side of the housing, and the swing bracket is provided with a trigger end extending to the outside of the operation port.

[0014] Beneficial effects The advantages of this invention are: the design of a demagnetizing window with magnetic force difference allows the power generation component to automatically reverse its movement after completing the power generation action, driven by the unequal magnetic force difference between the two sides of the demagnetizing window, thereby resetting the power generation device. This eliminates the need for additional springs or other reset mechanisms, simplifies the overall structure, improves the reliability of the device, and solves the problem of the laborious pressing required for the self-resetting power generation method using springs in the prior art. Attached Figure Description

[0015] Figure 1a This is a schematic diagram of the power generation component in the first magnetized state in the power generation method / apparatus of the present invention.

[0016] Figure 1b This is a schematic diagram of the power generation component in the second magnetized state in the power generation method / apparatus of the present invention.

[0017] Figure 1c This is a schematic diagram of the structure of the power generation component after reset in the power generation method / apparatus of the present invention.

[0018] Figure 2 This is a schematic diagram of the electromagnetic pulse waveform of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the switch module of the present invention.

[0020] Figure 4 This is a top view of the internal structure of the switch module of the present invention.

[0021] Figure 5 This is a side view of the internal structure of the switch module of the present invention.

[0022] The components are: 1. Power generation assembly; 11. Iron core; 12. Coil; 2. Magnetic differential assembly; 21. Swing bracket; 211. Trigger end; 22. Demagnetizing plate; 23. Magnet; 24. Magnetic guide plate; 25. Demagnetizing window; 3. Housing; 31. Operation port; 4. Booster; 5. Strong magnetic area; 6. Weak magnetic area. Detailed Implementation

[0023] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention. See Figures 1a-1c The present invention discloses a self-resetting power generation method, which designs a demagnetizing window 25 with magnetic force difference, places a power generation component 1 in the demagnetizing window 25, and puts the power generation component 1 in a first magnetized state. A relative movement in a first direction is driven between the power generation component 1 and the demagnetizing window 25, changing the power generation component 1 from the first magnetized state to a second magnetized state. During the transition, the magnetic flux within the power generation component 1 changes, thereby generating induced electrical energy in the coil 12. After the drive is removed, the power generation component 1, under the influence of the magnetic force difference in the demagnetizing window 25, moves in a second direction opposite to the first direction, thus resetting the power generation component 1 to the first magnetized state.

[0024] By changing the position between the power-generating component 1 and the demagnetizing window 25, the purpose of generating induced electrical energy in an environment with magnetic differences is achieved. Furthermore, compared to existing technologies that generate electricity by cutting magnetic field lines or using spring self-resetting methods in a stable location, the power generation method of this invention cleverly utilizes the constructed magnetic difference environment and achieves self-resetting through different magnetized states, eliminating the need for additional spring assistance and solving the problem of laborious pressing in existing spring-based self-resetting power generation methods.

[0025] Specifically, in this embodiment, the demagnetizing window 25 is provided with a first magnetic end and a second magnetic end arranged opposite to each other. The magnetic force of the first magnetic end is greater than that of the second magnetic end, thereby realizing the formation of a magnetic force difference environment in the demagnetizing window 25.

[0026] In a magnetically differential environment, when the power-generating component 1 is in its first magnetized state, it is magnetized by the first magnetic end, specifically designed to be in an adsorption state where the first magnetic end attracts the power-generating component 1. When the power-generating component 1 is in its second magnetized state, the magnetic force exerted on it by the first magnetic end is greater than the magnetic force exerted on it by the first magnetized end. In other words, even if the magnetized state of the power-generating component 1 changes in a magnetically differential environment, it remains primarily attracted by the first magnetized end, thus providing the necessary conditions for its reset. It can still reset normally without external interference, offering a labor-saving effect and improving the user experience.

[0027] During the relative displacement between the aforementioned electrostatic component 1 and the demagnetizing window 25, a tiny induced pulse of energy is generated in the coil of the electrostatic component 1. The duration of the induced voltage varies depending on the pressing speed. Preferably, as shown... Figure 2 As shown, the electromagnetic pulse generated in this embodiment has a duration of less than 1.5 milliseconds and a voltage amplitude of less than 10V.

[0028] See Figures 1a-1cA power generation device based on the above-described power generation method includes an electromagnetizing component 1 and a magnetic differential component 2. The electromagnetizing component 1 is the core component for realizing electromagnetic induction, consisting of an iron core 11 and a coil 12 tightly wound around the iron core 11. The iron core 11 can be attracted by a magnet; the coil 12 is made of insulated copper wire, with leads at both ends for outputting induced electrical energy. The magnetic differential component 2 is used to construct a non-uniform magnetic field environment and provide the physical structure for relative motion. The magnetic differential component 2 consists of a swing bracket 21, a demagnetizing plate 22, a magnet 23, and a magnetic guiding plate 24. The swing bracket 21, as a movable load-bearing structure, is rotatably mounted on a fixed base via a pivot, such as within the housing 3 in the switch module embodiment. The demagnetizing plate 22 and the magnetic guiding plate 24 are respectively fixedly installed on the N and S poles of the permanent magnet (i.e., magnet 23). Specifically, the demagnetizing plate 22 is installed on one pole face (e.g., the N pole) of the magnet 23, and the magnetic guiding plate 24 is installed on the other pole face (e.g., the S pole) of the magnet 23. The demagnetizing plate 22 and the magnetic guiding plate 24 are opposite to each other and spaced apart by a certain distance, thereby forming a gap with an opening between them, which is the demagnetizing window 25 described in this invention. One end (or part) of the iron core 11 of the power generation assembly 1 extends into and is placed in this demagnetizing window 25. Through this design, the magnetic attraction force of the demagnetizing plate 22 on the iron core 11 is significantly less than that of the magnetic guiding plate 24 on the iron core 11, thereby forming a clear magnetic force difference on both sides of the demagnetizing window 25.

[0029] In conjunction with the power generation method of the present invention, the working principle of the above-mentioned power generation device is as follows: Initially (i.e., in the first magnetized state), since the magnetic force on the side of the magnetic guide plate 24 is much stronger than that on the side of the demagnetizing plate 22, the iron core 11 is attracted and held in close contact with the magnetic guide plate 24 under the action of the strong magnetic force. Figure 1a As shown, the magnetic flux passing through the iron core 11 and coil 12 is at a stable value at this time. When power generation is required, the swing bracket 21 is forced by external drive (such as manual pressing) to drive the entire magnetic differential assembly 2 to move relative to the fixed power generation assembly 1 in the first direction. As the relative movement occurs, the relative position of the iron core 11 within the demagnetizing window 25 changes, gradually moving away from the strong magnetic force magnetic guide plate 24 and closer to the weak magnetic force demagnetizing plate 22. When the iron core 11 moves to a certain position, such as when the iron core 11 contacts the demagnetizing plate 22 or the gap is minimal, such as... Figure 1b As shown, the magnetic field environment of the power generation component 1 undergoes a fundamental change, entering the second magnetized state. During this state transition, the magnetic flux through coil 12 changes rapidly. According to Faraday's law of electromagnetic induction, an induced electromotive force will be generated across coil 12, thus completing the power generation process. Figure 1cAs shown, after the external drive is removed, the magnetic force difference on both sides of the demagnetizing window 25 still exists. At this time, the iron core 11 is in the weak magnetic force, i.e., on the demagnetizing plate 22 side, while the strong magnetic force side, i.e., on the magnetic guide plate 24 side, still has a net attraction force on it. The potential energy formed by this magnetic force difference will drive the relative motion between the power generation component 1 and the magnetic difference component 2 in a second direction opposite to the first direction. That is, the swing bracket 21 automatically swings back under the action of magnetic force until the iron core 11 is firmly attracted by the magnetic guide plate 24 again, resetting to the initial first magnetized state. The entire cycle does not require mechanical reset components such as springs. It can achieve automatic reset after power generation only by relying on the imbalance of magnetic force, and the structure is simple and reliable.

[0030] In the power generation device of this invention, the side containing the magnetic plate 24 is defined as the first magnetic end, and the side containing the demagnetizing plate 22 is defined as the second magnetic end. It is necessary to ensure that the magnetic attraction (i.e., magnetic force) between the magnetic plate 24 side and the iron core 11 is always greater than that between the demagnetizing plate 22 side and the iron core 11. This difference in magnetic force is the key energy source for driving automatic reset.

[0031] In the power generation device designed in this invention, the parameters for a single power generation should meet the following requirements: the duration of the generated electromagnetic pulse is less than 1.5 milliseconds, and the voltage amplitude is less than 10V. This short, low-voltage pulse characteristic is very suitable for charging the subsequent rectifier circuit and energy storage capacitor, and ultimately powering low-power integrated circuits. It also avoids the potential damage or energy waste to sensitive electronic components caused by excessively high voltage or excessively wide pulses, as well as the problem of an excessively large overall power generation device.

[0032] In this power generation device, one specific implementation method for creating the magnetic force difference within the demagnetizing window 25 is to make the magnetic force provided by the demagnetizing plate 22 to the iron core 11 less than the magnetic force provided by the magnetic guiding plate 24 to the iron core 11. This is the most fundamental magnetic requirement for achieving the self-resetting function. To achieve this goal, there are various optional and equivalent specific structural designs.

[0033] The first preferred embodiment involves controlling the effective area of ​​the magnetically conductive component. Specifically, the magnetically conductive area of ​​the demagnetizing plate 22 is always smaller than that of the magnetically conductive plate 24. Here, "magnetically conductive area" can be understood as the effective cross-sectional area perpendicular to the magnetic field lines used for conducting the magnetic circuit. Different magnetically conductive areas result in different strengths of the conducted magnetic force, ultimately leading to different magnetic field strengths acting on the iron core 11. If the magnetic field strength acting on the iron core 11 is high after conduction, a higher electromotive force will be generated in the coil wound around the outer periphery of the iron core 11, thereby achieving higher energy output. For example, the demagnetizing plate 22 can be made into a narrow strip or small disc, while the magnetically conductive plate 24 can be made into a wide plate or large disc. According to Ohm's law for magnetic circuits, under the same magnetomotive force (provided by magnet 23), a component with a smaller magnetic permeable area has relatively greater magnetic reluctance, resulting in less magnetic flux being conducted and acting on the external iron core 11, thus exhibiting a weaker magnetic attraction. Conversely, a component with a larger magnetic permeable area has lower magnetic reluctance, allowing it to conduct more magnetic flux to act on the iron core 11, thereby exhibiting a stronger magnetic attraction. Through this area differentiation design, the required magnetic force difference can be easily and reliably formed on both sides of the demagnetizing window 25.

[0034] The second preferred embodiment controls the contact state with the iron core 11. When the magnetic plate 24 is in contact with the iron core 11, the iron core 11 experiences the most magnetic field lines and is in a saturated state. When the iron core 11 contacts or approaches the demagnetizing plate 22, the magnetic field lines in the iron core 11 change from a saturated state to a weak state. This change in the strength of the magnetic field lines leads to a higher electromotive force generated in the coil wound around the outer periphery of the iron core 11, thereby achieving a higher energy output. Therefore, the contact area between the magnetic plate 24 and the iron core 11 is always greater than the contact area between the demagnetizing plate 22 and the iron core 11. For example, the surfaces of the magnetic plate 24 and the iron core 11 facing each other can be machined into planes to ensure a large surface contact between them in the reset state (first magnetized state). At the same time, the surfaces of the demagnetizing plate 22 and the iron core 11 facing each other can be designed as arc-shaped convex surfaces, or a small contact bump can be set only in the center, or only the end of the demagnetizing plate 22 can make slight contact with the end of the iron core 11. Thus, when the iron core 11 moves to the side of the demagnetizing plate 22, the two only have point contact or a very small surface contact, resulting in a decrease in the magnetic flux through the demagnetizing plate 22 to the iron core 11, thereby weakening the magnetic force of the demagnetizing plate 22 on the iron core 11. Furthermore, the swinging of the swing bracket 21 causes the planar contact between the magnetic guide plate 24 and the iron core 11 to become an edge contact, thus changing the magnetic flux through the magnetic guide plate 24 to the iron core 11. However, the contact area between the iron core 11 and the magnetic guide plate 24 is still larger than the contact area between the iron core 11 and the demagnetizing plate 22, providing the necessary conditions for the automatic reset of the device. The advantage of this scheme is that the magnetic guide plate 24's attraction to the iron core 11 is very firm and stable during reset.

[0035] The third preferred embodiment is to control the gap with the iron core 11. Specifically, as follows: Figures 1a to 1c As shown, in the first magnetized state, the iron core 11 is in direct contact with the magnetic plate 24, with a certain contact area, while a preset gap is always maintained between the iron core 11 and the demagnetizing plate 22. In the second magnetized state, when the iron core 11 and the demagnetizing plate 22 are closest, a certain distance still exists between them. Although a certain gap exists between the iron core 11 and the magnetic plate 24 when the iron core 11 and the demagnetizing plate 22 are closest, it is sufficient to ensure that the magnetic attraction force of the magnetic plate 24 on the iron core 11 in this state is still greater than the magnetic attraction force on the demagnetizing plate 22. This scheme is one of the most direct and effective methods to create a magnetic force difference. Its advantage lies in its simple structure, requiring no complex processing of the shape of the demagnetizing plate 22 or the magnetic plate 24, only precise control of the installation position.

[0036] The common technical effect of the above three methods of constructing magnetic force difference is that they can all effectively ensure that the magnetic force on the demagnetizing plate 22 side is weaker than that on the magnetic guiding plate 24 side. Thus, after the external force is removed, the magnetic force difference can drive the system to automatically reset, completely replacing the traditional mechanical spring.

[0037] Figures 3-5An embodiment of applying the above-described power generation device to a switching module is shown. The switching module includes a housing 3 and a circuit board. The power generation device is integrally integrated and installed within the internal space of the housing 3. The power generation component 1 is fixedly mounted on the inner wall of the housing 3 via a bracket or clip. Two lead wires of its coil 12 are electrically connected to the input terminal (typically a rectifier bridge or energy storage capacitor) on the circuit board, thereby transmitting the generated electrical energy to the control circuit of the switching module. The swing bracket 21 of the magnetic differential assembly 2 is rotatably mounted on a pre-set support inside the housing 3 via a rotating shaft or bushing, allowing it to swing freely within a certain angle around the shaft. The end of the iron core 11 of the power generation component 1 is inserted into and accommodated within the demagnetizing window 25 of the magnetic differential assembly 2. In the initial state, the iron core 11 is attracted by the magnetic plate 24 of the magnetic differential assembly 2, thus providing a stable initial position for the swing bracket 21. An operation port 31 is provided on one side wall of the housing 3, and a trigger end 211, integrally formed with the swing bracket 21, extends through the operation port 31 to the outside of the housing 3. Users can apply a driving force to the swing bracket 21 by pressing or flicking the exposed trigger terminal 211, triggering the aforementioned power generation process. The generated electrical energy, after passing through the processing circuitry (such as rectification, voltage regulation, and energy storage) on the circuit board, can power on onboard modules such as the wireless transmitter module, enabling them to send a switch control signal, thereby realizing the function of a wireless switch. After one operation, releasing the trigger terminal 211 causes the swing bracket 21 to automatically reset the entire magnetic differential assembly 2 under the action of magnetic difference. The iron core 11 is re-attracted by the magnetic guide plate 24, and the switch module returns to the ready-to-trigger state, awaiting the next operation. The entire switch module requires no battery, achieving complete self-generation and self-reset, and has the advantages of ultra-long service life and maintenance-free operation.

[0038] In the switching module of the present invention, the specific design of the power generation device in the switching module is described in the above-described "third preferred embodiment".

[0039] When the magnetic forces provided by the demagnetizing plate 22 and the magnetic guiding plate 24 to the iron core 11 are different, under the drive of an external force, when the distance between the magnetic guiding plate 24 and the iron core 11 is less than 0.4 mm, if the external force is released, the magnetic guiding plate 24 and the iron core 11 will automatically return to their normal state under the attraction of the magnetic force, and the magnetic differential assembly 2 can automatically reset and generate primary electrical energy; however, when the distance between the magnetic guiding plate 24 and the iron core 11 is greater than 0.4 mm, if the external force is released, the magnetic differential assembly 2 needs a small-force booster 4 to help achieve the reset, such as... Figure 4 As shown.

[0040] When the magnetic plate 24 is separated from the iron core 11, there is an air gap between the magnetic plate 24 and the iron core 11. According to the basic principle of electromagnetism, the magnetic field always conducts along the shortest path. When it encounters air, the magnetic field will weaken exponentially. A displacement distance of "0.4 mm" can reduce the magnetic field strength by about 75%, thereby generating magnetic field disturbance in the iron core 11, which in turn causes the coil to generate energy.

[0041] Compared to existing technologies where the reset force provided by the reset spring must be greater than the driving force of the generator to properly drive the power generation device to reset, in this invention, the booster 4 can provide a smaller thrust. Specifically, it only needs to provide enough force to automatically reset the iron core 11 in the second magnetized state, often less than half the reset force provided by a traditional reset spring. Therefore, this invention saves the force required to drive the generator, resulting in a significant energy-saving effect. The booster 4 can be made of shape-memory silicone, elastic wire, spring sheet, or dome switch, etc., to achieve automatic reset of the power generation device.

[0042] Specifically, the trigger end 211 acts as a lever, which can further reduce the driving force required by the generator; if the length of the trigger end is increased, it will be more effortless to drive the generator. However, increasing the length of the trigger end will increase the swing amplitude of the trigger end 211 when the generator is driven. In some ultra-thin self-generating switches, the swing amplitude of the trigger end is limited by the ultra-thin design. Therefore, in order to balance the relationship between length and swing amplitude, it is preferable that the swing stroke of the outermost part of the trigger end 211 is set to be less than 2.5 mm.

[0043] In the specific implementation of the power generation device and switching module of the present invention, the magnet 23 is preferably a high-performance neodymium iron boron permanent magnet to provide a sufficiently strong magnetic field. The materials of the magnetic conductive plate 24 and the demagnetizing plate 22 are preferably iron-nickel alloys, which have both high magnetic permeability and excellent corrosion resistance.

[0044] In addition to the basic rectifier and energy storage unit, the control circuit on the circuit board may also include modules such as voltage detection, signal encoding, wireless transmission (such as Bluetooth, Zigbee, and radio frequency), and switching circuits. These are all mature electronic technologies in automatic reset switches, and will not be elaborated on here.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A self-resetting power generation method, characterized in that, Design a demagnetizing window (25) with magnetic force difference, place a power generation component (1) in the demagnetizing window (25), and make the power generation component (1) be in a first magnetized state; The relative movement between the power generation component (1) and the demagnetizing window (25) in a first direction is driven to change the power generation component (1) from the first magnetized state to the second magnetized state, so that the magnetic flux in the power generation component (1) changes during the transition of the magnetized state, thereby generating induced electrical energy in the power generation component (1). After the drive is removed, the power generation component (1) operates relative to the first direction in a second direction under the influence of the magnetic force difference in the demagnetization window (25), so that the power generation component (1) is reset to the first magnetized state.

2. The self-resetting power generation method according to claim 1, characterized in that, The demagnetizing window (25) is provided with a first magnetic end and a second magnetic end arranged opposite to each other. The magnetic force of the first magnetic end is greater than that of the second magnetic end, so as to form a magnetic difference environment in the demagnetizing window (25).

3. The self-resetting power generation method according to claim 2, characterized in that, When the power generation component (1) is in the first magnetized state, the power generation component (1) is magnetized by the first magnetic end; when the power generation component (1) is in the second magnetized state, the magnetic force exerted on the power generation component (1) by the first magnetic end is greater than the magnetic force exerted on the power generation component (1) by the first magnetized end.

4. The self-resetting power generation method according to claim 1, characterized in that, When the magnetization state of the power generation component (1) changes, the electromagnetic pulse generated has a duration of less than 1.5 milliseconds and a voltage amplitude of less than 10V.

5. A power generation device based on the power generation method according to any one of claims 1-4, characterized in that, It includes an electric generating component (1) and a magnetic differential component (2); the electric generating component (1) consists of an iron core (11) and a coil (12) wound on the iron core (11); the magnetic differential component (2) consists of a demagnetizing plate (22), a magnet (23) and a magnetic guiding plate (24) mounted on a swing bracket; the demagnetizing plate (22) and the magnetic guiding plate (24) are respectively mounted on the two magnetic poles of the magnet (23) so that a demagnetizing window (25) is formed between the demagnetizing plate (22) and the magnetic guiding plate (24).

6. A power generation device according to claim 5, characterized in that, The magnetic force provided by the demagnetizing plate (22) to the iron core (11) is less than the magnetic force provided by the magnetic plate (24) to the iron core (11).

7. A power generation device according to claim 6, characterized in that, The magnetic conductive area of ​​the demagnetizing plate (22) is smaller than that of the magnetic conductive plate (24).

8. A power generation device according to claim 6, characterized in that, The contact area between the magnetic plate (24) and the iron core (11) is greater than the contact area between the demagnetizing plate (22) and the iron core (11).

9. A power generation device according to claim 6, characterized in that, When the power generation component (1) is in the first magnetized state, the iron core (11) is in direct contact with the magnetic plate (24), and there is a gap between the iron core (11) and the demagnetizing plate (22); when the power generation component (1) is in the second magnetized state, there are gaps between the iron core (11) and the magnetic plate (24) and the demagnetizing plate (22), and the magnetic attraction force of the magnetic plate (24) on the iron core (11) is greater than the magnetic attraction force of the demagnetizing plate (22) on it.

10. A switch module, comprising a housing (3) and a circuit board, characterized in that, The housing (3) is equipped with the power generation device as described in claim 5; wherein the power generation component (1) is installed in the housing (3) and electrically connected to the input end of the circuit board, the swing bracket (21) of the magnetic differential component (2) is rotatably installed in the housing (3), the iron core (11) of the power generation component (1) is inserted into the demagnetizing window (25) and is attracted by the magnetic plate (24) of the magnetic differential component (2); an operation port (31) is provided on one side of the housing (3), and the swing bracket (21) is provided with a trigger end (211) extending to the outside of the operation port (31).

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